Ballpoint pen



FIG. 1 is a top perspective view of the ballpoint pen according to the present invention;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a first side view thereof;

FIG. 6 is a second side view thereof;

FIG. 7 is a first end view thereof; and,

FIG. 8 is a second end view thereof. 

The ornamental design for a ballpoint pen, as shown and described. 